Alumina porous ceramics: mathematical behavior at different commercial starch concentration
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Data
2008-01-01
Autores
Fernandes, Rodrigo Sampaio [UNESP]
de Campos, Elson
Minatti, Jose Luiz [UNESP]
Santana, Jerusa Goes A. [UNESP]
Mota, Rogério Pinto [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Trans Tech Publications Ltd
Resumo
Several researches have been developed in order to verify the porosity effect over the ceramic material properties. The starch consolidation casting (SCC) allows to obtain porous ceramics by using starch as a binder and pore forming element. This work is intended to describe the porous mathematical behavior and the mechanical resistance at different commercial starch concentration. Ceramic samples were made with alumina and potato and corn starches. The slips were prepared with 10 to 50 wt% of starch. The specimens were characterized by apparent density measurements and three-point flexural test associated to Weibull statistics. Results indicated that the porosity showed a first-order exponential equation e(-x/c) increasing in both kinds of starches, so it was confirmed that the alumina ceramic porosity is related to the kind of starch used. The mechanical resistance is represented by a logarithmic expression R = A + B/1+10((Log(x0)-P)C).
Descrição
Palavras-chave
Porous ceramics, starch consolidation casting, alumina, mathematical behavior
Como citar
Advanced Powder Technology Vi. Stafa-zurich: Trans Tech Publications Ltd, v. 591-593, p. 442-447, 2008.